17 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| San Diego | 1 | 3,517 | 3,736 | -1.24% | 1,850 | 1.90 | City |
| Freer | 2 | 2,301 | 2,456 | -1.33% | 558 | 4.12 | City |
| Benavides | 3 | 1,116 | 1,186 | -1.24% | 630 | 1.77 | City |
| Alice Acres | 4 | 1,096 | 282 | 3.79% | 186 | 5.89 | CDP |
| Rancho Alegre | 5 | 948 | 769 | -5.01% | 742 | 1.28 | CDP |
| South La Paloma | 6 | 776 | 389 | 3.74% | 700 | 1.11 | CDP |
| Coyote Acres | 7 | 720 | 1,215 | 1.98% | 140 | 5.13 | CDP |
| K-Bar Ranch | 8 | 674 | 362 | 3.22% | 200 | 3.37 | CDP |
| Amargosa | 9 | 382 | 302 | 1.6% | 286 | 1.34 | CDP |
| Alfred | 10 | 372 | 90 | 6.9% | 301 | 1.24 | CDP |
| Thompsonville | 11 | 184 | 190 | 6.98% | 47 | 3.89 | CDP |
| Owl Ranch | 12 | 91 | 286 | -9% | 123 | 0.74 | CDP |
| Realitos | 13 | 70 | 113 | -10.26% | 263 | 0.27 | CDP |
| South Fork Estates | 14 | 69 | 60 | 7.81% | 21 | 3.35 | CDP |
| Concepcion | 15 | 18 | 44 | 12.5% | 225 | 0.08 | CDP |
| Westdale | 16 | 12 | 93 | -66.67% | 3 | 4.03 | CDP |
| Las Lomitas | 17 | 9 | 64 | -64% | 2 | 3.95 | CDP |
San Diego is the largest city in Duval County, with a population of 3,517.
Las Lomitas is the smallest city in Duval County.
There are 17 cities in Duval County, Texas.